Variable-throw device.



F. A. HART. VARIABLE THROW DEVICE.

APILIOATIOH FILED FEB. 6, 1912.

Patented Aug. 4, 1914.

fnventdr W 4. M w By 11135 Attorneys, fl% um UNITED STATES PATENT()EFICE.

FREDERICK A. HART, or NEWARK, NEW JERSEY, nssrorion. 'ro JOHN T.UNDERWOOD,

on BROOKLYN, nnwxonn.

v I VARIABLE-THROW DEVICE.

Specification of Letters Patent.

Patented Aug. 4, 1914..

Original application filed December 10, 1908. Serial No. 466,886.llivided and this application filed February 6, 1912. Serial110,675,773.

the invention, such as will enable others skilled in the art to which itappertains to make and use the same.

Broadly, my invention has for its object to provide a variable throwdevice, and to such end the invention consists ofthe novel devices andcombinations of devices-hereinafter described and defined in the claims.

The present application is filed as a division of my prior pendingapplication, S. N. 466,836, filed of date December 10th, 1308, titleCombined typewriting and computing machine. In the said priorapplication the variable throw device, which is'made the subject of thisapplication, shown in use as an adjustable means for imparting variablereturn movements to -the typewriter carriage; or, in other words, forbringing the typewriter carriage to different desired normal ositionstoward the right under the constant predetermined movements of theoperating lever of the computer.

The improved variable throw device is ca pable of numerous differentuses, but, in' so far as its particular application is illustrated inthe drawings, it is shown as especially designed for the above notedparticular uses.

Inthe accompanying drawings, which illustrate the invention, likecharacters indicate like parts throughout the several views.

Referring to the drawin s, Figure'l is a view in left side elevation, sowing the variable throw device designed as above indicated; Fig. 2 is aplan view of the parts shown in Fig. 1, some parts being broken away andsome parts in section; Fig. 3 is a vertical section taken approximatelyon the line 03 m of Fig. 2, but illustrating differ ent positions of theparts; and Fig. 4 is a horizontal view taken approximately on line a wof Fig. 1.

Describing this variable throw device, designed for the particular uses,above stated, a flexible connection such as a tape 0 is attached to thefree end of a typewriter line the c", supported by the frame 30. Anoperat 1ng lever a is mounted on the shaft 0 adjacent to the main gear 0and the said two elements 0 and 0' are free for independent rotary oroscillatory movements. The operating lever c carries a spur pinion cthat is in constant mesh with the main gear c and is adapted to beengaged with a similar spur pinion c which latter also meshes with themain gear 0 This pinion is loosely journaled in the outer extrem- 1ty ofa supporting arm 0 which arm, as shown, is bifurcated and straddles themain gear 0 and is loosely journaled on the shaft 0 0 engages the pinionc undcr friction to prevent the said arm from being accidentally movedfrom any set position on the gear 0. However, the arm 0 may be easilymoved so as to set the pinion c in any posit1on deslred on the gear a;and, hence, normally any desired distance away from the pinion c of theoperating lever 0.

As is evident, when the operating lever 0 is moved forward or toward theleft from its normal position, shown in Fig. 1, the main gear 0 pinion 0and other parts, driven therefrom, will remain stationary and the pinion0 will freely rotate until the said pinion 0 is moved into engagementwith the pinion 0 whereupon the two pinions, 'by their opposin action ortendency to rotate the gear 0 Wlll lock the said main gear 0 to theoperating lever 0 so that subsequent or continued movement of the saidoperating lever will positively rotate the said gear 0, and parts driventherefrom. In this way, any part which receives movement from the gear 0may, by a predetermined movement of the operaing lever through aconstant are, be given predetermined variable movements depending on thesetting of the arm a and pinlon 0 Otherwise stated, the nearer the saidpinion c is normally set to the pinion 0 the greater will be themovement which will be imparted to the main gear 0 and parts driventhere- Preferably, the supporting armfrom, under a completepredetermined movement of the operating lever between certain points as,for instance, between pomts determined by fixed stops y and 3 It isevident that the frictional engage,

ment between the pinion o and its" supporting arm a, is not at allrequired or relied upon to prevent movement of the said pinion and armin respect to the gear 0 at a time when the two pinions a and c areengaged; for, it is well understood that two pinions or gears engagedwith each other and with a throw pinion or' gear, will 1nterlock so thatno one of the three can rotate in, respect to the other..

The tape a may be s ring actuated, as by the usual carriage fgee.tension, and will therefore operate wheel 0 upon return of lever .0causing wheel a through pinions c to return the gear wheel a to normalposition. e

As already stated, this variable throw device is capable of numeroususes and the particular application thereof, shown in the drawings andillustrated more fully in my said prior application, is only one ofthese many possible uses.

What I claim is:

1. A variable throw device comprising a main gear, a lever and an armpivoted on the axls of said main gear, and pinions journaled on saidlever and arm, in constant mesh with said main gear and engageable witheach other to variably determine, the effective movement of said lever.

2. A variable throw device comprising a main gear, a lever and an armpivoted on the axis of said main gear,a pinion loosely journaled to saidlever, another pinion loosely journaled to said arm but havingfrictional engagement therewith, said two pinions being in constant meshwith said maingear and engageable with each other to variably determinethe efiective movement of said lever, and a gear meshing with said maingear and having connections for transmitting. a variable movementtherefrom.

v 3. A variable throw device including a train of independently andloosely mounted toothed members, two of said members continuallyintermeshing with a third, one of said members being adjustablerelatively to the others, and means for moving one of said members idlyuntil all three members become intermeshed for further,- unifiedmovement.

4. A variable throw device including a train of independently andloosely mounted toothed members, two of said members continuallyintermeshing and all of said members being capable of intermeshing forunified movement, one of said'members being adjustable variably inadvance of another of said members that the extent of independ- 'nale1,1oem4 ent movement of said other member may be thereby regulated.

5. A variable throwdevice comprislng a gear wheel and pinionsmeshingtherewith, said pinions having idle movement when separate, oneof said pinions being variably adjustable as to its position withrespect to the other, and means for moving said other pinion into meshwith said adjusted pinion to permit unified movement of said gear andpinions.

6. A variable throw device com rising a gear wheel and pinions meshedtherewith,

said (gear and pinions beingseparately jourand said pinions having idlemovement when separate, one of said pinions being variably adjustable asto its osition in advance of the idle movement 0 the other pinion, andmeans for moving said other pinion into mesh with said adjustable pinionto permit unified movement of said gear and pinions.

7. A variable throw device comprising a gear wheel and pinions meshedtherewith, supports. for said pinions having the same axis as said gearwheel, said pinions havin idle movement when separate, one of, saidpinions being variably adjustable as to its position in advance of theidle movement of the other pinion, and means for moving said otherpinion into mesh with said adjustable pinion to permit unified movementof said gear and'pinions,

8. A variable throw device comprisin a I gear wheel, a shaft therefor,an arm an a lever extending from said shaft, said arm and lever eachcarrying a pinion in mesh with said gear wheel, said pinions beingcapable of independent idle movement wit respect to each other and saidgear wheel, and said arm being variably ad'ustable with respect to saidlever to regulate t e degree of movement required of said lever inbringing its pinion into engagement with the pinion on said arm forunified movement of said gear wheel and pinions in the further travel ofsaid lever.

9. In a variable throw device, in combina tion, a shaft, a gear wheelloosely mounted thereon, a lever fast on said shaft, a pinion carried bsaid lever in mesh with said gear, an arm oose on said shaft, and apinion carried by said arm in mesh with said gear,

wheel said arm being adjustable with its pinion upon said gear wheelvariably with relation to the pinion upon said lever, to {egulate thedegree of idle movement of said ever.

10. A variable throw device includin a gear wheel and pinions meshedtherewith, said pinions being independently movable, a support foroneeof said pinions to adjust it varlably upon said gear wheel withrespect to the other pinion, and an oscillating, lever carrying saidother pinion to move it independently into engagement with said adustedpinion for unified movement of said gear wheel and pinions in thecontinued travel of said lever.

11. A variable throw device having three toothed members capable ofindependent rotation and capable of locking together forunified movementabout a single axis, one of said members being variably adjustable'toregulate the degree of unitary movement of another of said members.

' 12. A variable throw device having three toothed members freelyrotatable on separate axes capable of locking togetherfor unitedmovement about a single axis, one of said members being variablyadjustable to regulate the degree of unitary movement of another. ofsaid members.

13. 'In a variable throw device, in combination, a shaft, a gear wheelloosely mounted thereon, a pinion meshed with said gear wheel, a leverfast on said shaft and carr ing said pinion, said lever capable ofoscillating movement over a determined path,

an arm loose on said shaft adjustable to variable positions relativelyto said lever, and a pinion carried by said arm in mesh with said wheel,said pinions when engaged by movement of said lever toward the adjustedposition. of said armpermitting further travel of said lever to movesaid pinions-and gear wheel unitedly.

14. A variable throw device comprising a gear wheel and pinions meshingtherewith, said pinions having idle movement when separate, one of saidpinions being variably adjustable as to its position with respect to theother, a lever supporting and moving said other pinion into mesh withsaid adjusted pinion, to permit unified movement of said gear andplnions, and means for retracting said gear wheel upon return of saidlever.

15. A variable throw device comprising a gear wheel having means torotate idly in one direction, and pinions meshing with said gear, sandpinions havin idle movement when separate, one of sai pinions beingvariably adjustable as to its position with respect to the other, andmeans for moving said otherpinion into mesh with said adjusted pinion,to permit unified movement of said gear and pinions in the otherdirection.

In testimony whereof I afiix my signature Witnesses:

W. LEDRUo'r, LOUISE D. MAIEIL

